You're right - you did not make it clear that the building was only 100 feet wide.

If the building on;y covers 100 feet of the side x, then

x+(x-100)+2y = 900
2x+2y=1000
x = 500-y

and follow the same steps above.

If I still have it wrong, then just draw yourself a diagram and label the various parts, making sure all the fence sections add up to 900. Then substitute for x or y in the formula a=xy.

Answer this Question

First Name:

School Subject:

Answer:

Related Questions

Maximum Area-Calculus-Edit - We have 900 ft of fencing and we want to construct ...
AP Calculus - The management of a large store has 1600 feet of fencing to fence ...
math - Susan's back yard is rectangular with dimensions 39 yd. by 71 yd. Carlos'...
calculus help - Farmer Brown wants to fence in a rectangular plot in a large ...
math - Ms. Jacobs is planning to put a fence around a rectangular part of her ...
math - Chris wants to make an enclosed rectangular area for a mulch pile. She ...
5th grade math - suppose you are building a fence for a garden in your yard. ...
HELP!!! Math - The area of a yard is 15000 ft^2. If the ratio of the lenght to ...
Math - John wants to build a corral next to his barn.He has 300 feet of fencing ...
Algebra - John wants to build a corral next to his barn. He has 300 feet of ...